Last Known Eruption
15h 52m ago

Latest Eruptions

Eruption DurationInterval
19 Jun 2018 @ 14599h 45m
19 Jun 2018 @ 0514 E10h 9m
18 Jun 2018 @ 190511h 55m
18 Jun 2018 @ 0710 E11h 25m
17 Jun 2018 @ 1945 ie8h 48m
17 Jun 2018 @ 105712h 49m
16 Jun 2018 @ 2208 E11h 41m
16 Jun 2018 @ 1027 ie19h 6m
15 Jun 2018 @ 152112h 18m
15 Jun 2018 @ 0303 E9h 17m
14 Jun 2018 @ 174610h 20m
14 Jun 2018 @ 072611h 43m
13 Jun 2018 @ 194313h 3m
13 Jun 2018 @ 0640 ie10h 31m
12 Jun 2018 @ 200910h 34m
12 Jun 2018 @ 093523h 42m
11 Jun 2018 @ 09531d 13m
10 Jun 2018 @ 09401d 18m
09 Jun 2018 @ 092218h 49m
08 Jun 2018 @ 143322h 45m
07 Jun 2018 @ 154810h 43m
07 Jun 2018 @ 0505 ie10h 14m
06 Jun 2018 @ 185110h 38m
06 Jun 2018 @ 081314h 59m
05 Jun 2018 @ 17141d 26m
04 Jun 2018 @ 164822h 17m
03 Jun 2018 @ 18319h 26m
03 Jun 2018 @ 090521h 50m
02 Jun 2018 @ 111520h 56m
01 Jun 2018 @ 14191d 15m
31 May 2018 @ 140420h 38m
30 May 2018 @ 17261d 7m
29 May 2018 @ 17199h 29m
29 May 2018 @ 075010h 52m
28 May 2018 @ 205810h 24m
28 May 2018 @ 103420h 14m
27 May 2018 @ 142023h 50m
26 May 2018 @ 1430 ns23h 3m
25 May 2018 @ 15271d 19h 46m
23 May 2018 @ 1941 ie1d 9h 21m
22 May 2018 @ 1020 ie7d 23h 13m
14 May 2018 @ 1107 ie22h 24m
13 May 2018 @ 1243 ie1d 19h 51m
11 May 2018 @ 1652 ie7d 47m
04 May 2018 @ 1605 ie4d 20h 34m
29 Apr 2018 @ 1931 ie1d 1h 23m
28 Apr 2018 @ 1808 ie3d 1h 50m
25 Apr 2018 @ 1618 ie72d 4h 19m
12 Feb 2018 @ 1059 ie11d 17h 31m
31 Jan 2018 @ 1728 ie81d 9h 27m
11 Nov 2017 @ 0801 ie9d 20h 12m
01 Nov 2017 @ 124921h 51m
31 Oct 2017 @ 145821h 7m
30 Oct 2017 @ 17511d 7h 15m
29 Oct 2017 @ 103621h 6m
28 Oct 2017 @ 1330 ns22h 45m
27 Oct 2017 @ 14451d 1h 43m
26 Oct 2017 @ 13021d 13h 2m
25 Oct 2017 @ 0000 A2d 6h 53m
22 Oct 2017 @ 1707 ie8h 55m
22 Oct 2017 @ 0812 ie14h 7m
21 Oct 2017 @ 1805 ie2h 35m
21 Oct 2017 @ 1530 ie6h 2m
21 Oct 2017 @ 0928 ie15h 53m
20 Oct 2017 @ 1735 ie2h 50m
20 Oct 2017 @ 1445 ie4h 37m
20 Oct 2017 @ 100820h 6m
19 Oct 2017 @ 140222h 5m
18 Oct 2017 @ 155722h 33m
17 Oct 2017 @ 17249h 54m
17 Oct 2017 @ 0730 A13h 46m
16 Oct 2017 @ 17449h 59m
16 Oct 2017 @ 0745 A20h 30m
15 Oct 2017 @ 111520h 55m
14 Oct 2017 @ 1420 ie1d 0m
13 Oct 2017 @ 142022h 56m
12 Oct 2017 @ 152421h 54m
11 Oct 2017 @ 1730 A23h 37m
10 Oct 2017 @ 1753 ns9h 8m
10 Oct 2017 @ 0845 ie2d 20h 12m
07 Oct 2017 @ 1233 ie19h 51m
06 Oct 2017 @ 164223h 6m
05 Oct 2017 @ 1736 maj55m 1d 5h 58m
04 Oct 2017 @ 113811h 53m
03 Oct 2017 @ 2345 ?25m 10h 25m
03 Oct 2017 @ 132022h 39m
02 Oct 2017 @ 144122h 16m
01 Oct 2017 @ 162522h 25m
30 Sep 2017 @ 180010h 0m
30 Sep 2017 @ 0800 E9h 30m
29 Sep 2017 @ 2230 E9h 34m
29 Sep 2017 @ 12569h 25m
29 Sep 2017 @ 0331 E10h 26m
28 Sep 2017 @ 17059h 40m
28 Sep 2017 @ 0725 E11h 27m
27 Sep 2017 @ 195812h 56m
27 Sep 2017 @ 0702 E11h 3m
26 Sep 2017 @ 1959 E11h 39m
26 Sep 2017 @ 082011h 28m
25 Sep 2017 @ 2052 E11h 12m

Interval Statistics

Interval Count100
Min2h 35m
Max81d 9h 27m
Mean2d 16h 7m
Median19h 58m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
8696 15 Jun 2018 @ 1238 15 Jun 2018 @ 1245 Maureen Initial overflow at 1238, that maintained until 1245, then dropped. Long false overflow.
8691 15 Jun 2018 @ 0832 --- DanS Post eruptive
8640 11 Jun 2018 @ 1920 --- DanS Not yet in overflow as of 1920
8612 09 Jun 2018 @ 2114 --- underarockphoto Overflow for 25m
8610 09 Jun 2018 @ 2100 --- Tara In early overflow. Left before eruption.
8585 09 Jun 2018 @ 0826 --- underarockphoto Near start of overflow
8526 07 Jun 2018 @ 1509 --- billwarnock In overflow; no boiling in center yet.
8536 07 Jun 2018 @ 1442 --- LynnS Start of overflow.
8504 06 Jun 2018 @ 0642 --- LynnS Start of overflow
8456 05 Jun 2018 @ 1130 --- billwarnock Great Fountain not yet in overflow.
8414 02 Jun 2018 @ 0945 --- Maureen Overflow start
8392 01 Jun 2018 @ 1250 --- LynnS Start of overflow
8376 31 May 2018 @ 1331 --- LynnS Already on overflow at 1331
8377 31 May 2018 @ 0515 --- LynnS Great Fountain had already finished its eruption.
8355 30 May 2018 @ 1612 --- geysergaze Overflow
8293 25 May 2018 @ 1130 --- Barbara Lasseter not in overflow
8318 25 May 2018 @ 1125 --- Kyle not in overflow and well below
7810 01 Nov 2017 @ 1105 --- billwarnock Great Fountain in early overflow.
7809 01 Nov 2017 @ 0957 --- billwarnock Not in overflow. Very windy day. Snow predicted around 1300.
7802 31 Oct 2017 @ 1310 --- billwarnock Great Fountain overflow started at about 1310
7794 29 Oct 2017 @ 0950 --- billwarnock In good overflow when I arrived.
7784 28 Oct 2017 @ 1019 --- udo About 6 inches below overflow but dropping.
7781 27 Oct 2017 @ 1202 --- DanS Not in overflow
7780 27 Oct 2017 @ 1008 --- DanS Not in overflow
7779 26 Oct 2017 @ 1825 --- DanS Looks normal post-eruptive.
7776 26 Oct 2017 @ 0925 --- udo Overflowing with boils appear to be continuing. Very doubtful that any eruptions have happened since the end of wild phase. It's still trying to recover. Runoff channels are flowing. The beach is dry where an eruption wave would have wetted it. 0944 dropping. 0957 overflow restarted. 1046 dropping. 1107 overflow restarted. 1126 dropping. 1141 overflow restarted. 1220 dropping. 1232 overflowing.
7770 25 Oct 2017 @ 1858 25 Oct 2017 @ 1930 DanS Still in overflow, boiling and crashing.
7769 25 Oct 2017 @ 1116 25 Oct 2017 @ 1722 billwarnock As Udo has noted, overflows today were accompanied by very strong boils, mainly around the rim. Overflow/heavy boils ranged from 22 to 29 minutes in duration, but the last two seen beginning at 1516 and 1645 lasted 32 and 37 minutes respectively. Durations of drops below overflow ranged between 12 and 15 minutes throughout this period. The last two drops the water wasn't visible. I still believe it had a large eruption overnight.
7754 25 Oct 2017 @ 1545 --- udo Pool is dropping with edge boils subsiding. Crashes are progressively getting deeper and taking longer to refill.
7755 25 Oct 2017 @ 1516 --- udo Overflow restarted with immediate boiling around edges. Again.
7756 25 Oct 2017 @ 1501 --- udo Pool is dropping with edge boils.
7753 25 Oct 2017 @ 1450 --- Janet White Boiling along edges like it’s ready to erupt but was told by Udo & Bill it’s been doing that for hours.
7757 25 Oct 2017 @ 1435 --- udo Overflow restarted.
7758 25 Oct 2017 @ 1417 --- udo Pool is dropping with edge boils continuing.
7759 25 Oct 2017 @ 1337 --- udo Pool is dropping with edge boils continuing.
7760 25 Oct 2017 @ 1310 --- udo Overflow and vigorous boiling restarted.
7761 25 Oct 2017 @ 1254 --- udo Pool is dropping with edge boils subsiding. Crash coming next I predict.
7762 25 Oct 2017 @ 1232 --- udo Overflow restarted with vigorous boiling.
7763 25 Oct 2017 @ 1215 --- udo Pool dropped below overflow again after vigorous edge boils subsided. Crashing at 1218.
7764 25 Oct 2017 @ 1154 --- udo Overflow with boiling restarted. Nearly hit a meter at 1155.
7765 25 Oct 2017 @ 1140 --- udo Crash!
7766 25 Oct 2017 @ 1116 --- udo Overflow and vigorous boiling has resumed after crashing. Nearly hit a meter at 1118 but not in the area where meter boil usually happens. Very odd.
7767 25 Oct 2017 @ 1101 --- udo Crashed to about a foot below overflow.
7768 25 Oct 2017 @ 1035 --- udo Nice boiling action. Upper terrace is overflowing into lower terrace and runoff channel. Runoff channels are flowing thru 2nd culvert and toward White Dome. Looks pre-eruptive. We'll see.
7750 24 Oct 2017 @ 1800 24 Oct 2017 @ 1940 DanS Still quietly in overflow. No edge boils yet. Departed at last light 1940, under quarter moon and big dipper. Coyote ambled by and crossed road at 1824.
7748 24 Oct 2017 @ 1613 24 Oct 2017 @ 1750 billwarnock Was in light overflow when I arrived. Also saw Fountain plume ie at 1613. Went to Flats to confirm & met Maureen. When we returned to GF after 1630 still in light overflow which increased until 1649 when pool dropped. Rises to overflow then slight drop continued until I left at 1750. Dan S still there.
7747 24 Oct 2017 @ 1700 --- Maureen Going in and out of overflow. Quick up and downs. No boils seen yet. Beautiful day in the LGB. So nice.
7741 24 Oct 2017 @ 1552 --- udo Overflow restarted. Unfortunately I must leave this.
7742 24 Oct 2017 @ 1539 --- udo 3rd overflow start. Stopped after 8 minutes.
7743 24 Oct 2017 @ 1525 --- udo 2nd overflow start. Lasted about 3 minutes and stopped.
7744 24 Oct 2017 @ 1510 --- udo Overflow started just orior to my arrivsl at 1510. Stopped after approx. 5 minutes. Did not crash.
7739 24 Oct 2017 @ 1344 24 Oct 2017 @ 1430 billwarnock Water in center pool now placid and about a foot below rim. Yesterday afternoon water not visible; boiling heard and lots of steam. During 45 minutes pool rose a little and fell a little 3 times, never quite reaching overflow. Will check back later.
7738 24 Oct 2017 @ 1350 --- DanS Still quiet.
7745 24 Oct 2017 @ 1240 --- udo Dry patches still exist and are enlarging. No overflows yet.
7735 23 Oct 2017 @ 1030 23 Oct 2017 @ 1545 udo No water visible in vent. Runoff channel near road had small areas of ice in it this morning. Upper terrace had dry spots this afternoon indicating it has not overflowed since wild phase eruptions ended.
7693 08 Oct 2017 @ 1115 --- Maureen Prediction guess of 1500 + - 60 min. Nice weather in the LGB.
7690 05 Oct 2017 @ 1010 --- Kitt B post eruptive
7682 02 Oct 2017 @ 1325 --- Kitt B start of overflow
7598 01 Oct 2017 @ 1535 --- Tara Per Maureen, Great Fountain prediction 1610-1640.
7597 01 Oct 2017 @ 1436 --- Kitt B Maureen doesn't expect Great Fountain until after 1600.
7523 28 Sep 2017 @ 1705 --- billwarnock Great Fountain pulled a short, starting at 1705. Maureen was there and will post time and further information.
7468 27 Sep 2017 @ 1827 --- Tara Overflow started.
7415 26 Sep 2017 @ 0915 --- udo Ended but still running off. Per Xanterra tourbus driver at White Dome GF had no activity for over 10 minutes.
7298 25 Sep 2017 @ 0820 --- Barbara Lasseter overflow started
6494 16 Sep 2017 @ 0707 --- TSBryan Very late stages of eruption.
6289 12 Sep 2017 @ 0721 --- RLJones About 6 inches below overflow at 0721
6260 10 Sep 2017 @ 1040 --- Kitt B Great Fountain had crashed and water was out of sight.
6124 09 Sep 2017 @ 1050 --- Graham Start of overflow. Prediction 1215 +- 15m
5739 04 Sep 2017 @ 1007 --- WillBoekel overflow start
5343 21 Aug 2017 @ 0900 --- jkern No overnight E times for 8/20, 8/21 due to faulty data logger
5179 20 Aug 2017 @ 1943 --- minissa Watched pool progress nearly to OF, then observed quick drop to 6-8" at time indicated (prediction on board still said 6-10pm)
5342 16 Jul 2017 @ 0900 --- jkern No overnight E times on 8/15, 8/16 due to faulty logger.
4427 09 Jul 2017 @ 1115 --- udo prediction 1400 +/- 2 hours 724 Victor
4349 22 Jun 2017 @ 1215 --- Maureen Overflow start 1215
7737 27 Nov 2016 @ 0119 03 Dec 2016 @ 0202 Jake probable wild phase activity during this time period. No clear eruption spikes on the data logger
3852 05 Nov 2016 @ 1545 --- Maureen Prediction 1710 + - 15 minutes.
3844 04 Nov 2016 @ 1606 --- Maureen Overflow start. prediction 1730 + - 15 minutes
3840 04 Nov 2016 @ 0920 --- udo Post eruptive.
3838 03 Nov 2016 @ 1725 --- udo Overflow started approx 1725. Predicted eruption 1835 1905.
3832 30 Oct 2016 @ 1834 --- steve Great Fountain was in overflow at 1834. did not wait in the rain. Not boiling much at that time
3825 28 Oct 2016 @ 1135 --- DanS Pool up with small boils at edges
3822 27 Oct 2016 @ 1412 --- udo Appears to be post eruptive. Beach is wet up to about 4 inches. Runoff channels trickling in all directions & all the way down to marsh by White Dome. Low pool edge boils.
3810 25 Oct 2016 @ 1833 --- DanS Now in overflow, didn't stay for dark time eruption
3809 25 Oct 2016 @ 1744 --- DanS Not in overflow yet.
3806 25 Oct 2016 @ 1115 --- DanS Post eruptive 1115
3805 24 Oct 2016 @ 1006 --- udo Overflow just started perhaps a minute or 3 ago.
3797 23 Oct 2016 @ 0740 --- DanS Post eruptive. All done
3796 22 Oct 2016 @ 1545 --- Maureen Prediction 1710 + - 15 minutes.
3793 21 Oct 2016 @ 1234 --- udo Predicted for 1410 1440
3791 19 Oct 2016 @ 1653 --- Devin C. The overflow prediction is 1745 +/- 15
3758 07 Oct 2016 @ 1305 --- Maureen Prediction 1430 + - 20 minutes. Weird overflow start so a bit bigger window than normal.
3745 04 Oct 2016 @ 1805 --- ARoe Empty
3735 01 Oct 2016 @ 1625 --- Maureen Prediction 1750 + - 15 minutes based on 1625 overflow start. Raining in the LGB.
3728 30 Sep 2016 @ 0835 --- Kitt B It was post eruptive at 0835 with small trickle of water heard at terrace near willows.
3725 29 Sep 2016 @ 0837 --- Kitt B Great Fountain was post eruptive with boiling in a lower level pool a terraces quiet. Probably erupted 1 to 2 hours before.
3723 27 Sep 2016 @ 0940 --- Kitt B It was post eruptive.
3718 26 Sep 2016 @ 0830 --- udo Post eruptive.
3704 22 Sep 2016 @ 1630 --- Maureen No water visible at all between 1440 and 1630. Could easily go outside of window, maybe in dark.
3692 20 Sep 2016 @ 0958 --- udo NPS prediction 1530
3638 10 Sep 2016 @ 1220 --- Maureen Overflow start 1220, prediction 1345 + - 15m
EntrySourceLinkComment
30 May 2018 @ 1726 EricZ https://static-geysercam-xyz.nyc3.digitaloceanspaces.com/GreatFountainGeyser.mp4 Video taken by tourist Grant Arinder
26 Jul 2017 @ 1752 JSJ https://www.flickr.com/photos/jsjgeology/36237239410 Photo (out of 10) of Great Fountain Geyser's 5:52 PM-onward eruption on 26 July 2017.
03 Jun 2017 @ 1832 JSJ https://www.flickr.com/photos/jsjgeology/34985316630 Photo (out of 9) of Great Fountain Geyser's evening eruption on 3 June 2017.
02 Jun 2017 @ 1645 JSJ https://www.flickr.com/photos/jsjgeology/35205457072 Photo (out of 7) of Great Fountain Geyser's late afternoon eruption on 2 June 2017.
02 Jun 2017 @ 1645 JSJ https://www.youtube.com/watch?v=UL1mwSjv1RY Time lapse video of Great Fountain Geyser's late afternoon eruption on 2 June 2017.
13 Aug 2016 @ 2027 JSJ https://www.youtube.com/watch?v=esB95f0I52U Time lapse video of Great Fountain Geyser's evening eruption on 13 August 2016.
13 Aug 2016 @ 2027 JSJ https://www.flickr.com/photos/jsjgeology/30109996042 Photo (1 of 7) of Great Fountain Geyser's evening eruption on 13 August 2016.
10 Aug 2016 @ 2018 JSJ https://www.flickr.com/photos/jsjgeology/30139312821 Photo (1 of 24) of Great Fountain Geyser's evening eruption on 10 August 2016.
10 Aug 2016 @ 2018 JSJ https://www.flickr.com/photos/jsjgeology/29594675523 Thermal image (1 of 3) of Great Fountain Geyser's evening eruption on 10 August 2016.
10 Aug 2016 @ 2018 JSJ https://www.youtube.com/watch?v=t4LIaXxRt0s Time lapse video of Great Fountain Geyser's evening eruption on 10 August 2016.
08 Sep 2014 @ 1505 Micah Kipple https://www.flickr.com/photos/sgplewka/15604440267 flickr
06 Sep 2014 @ 2003 Micah Kipple https://www.flickr.com/photos/wildwood4est/15368309463 flickr
13 Sep 2014 @ 1411 Micah Kipple https://www.flickr.com/photos/digbydachshund/15940278098 flickr
02 Jun 2014 @ 1303 Micah Kipple https://www.flickr.com/photos/125791209@N06/16128797716 flickr
25 Sep 2014 @ 1725 Micah Kipple https://www.flickr.com/photos/hhayk/16012608917 Flickr
24 Sep 2014 @ 1907 Micah Kipple https://www.flickr.com/photos/rtsmithcpa/15187347577 Flickr
24 Sep 2014 @ 1907 Micah Kipple https://www.flickr.com/photos/rtsmithcpa/15187166390 Flickr photo
19 Sep 2012 @ 1502 Jake http://www.youtube.com/watch?v=B3bTX5OQUEY a visitor\'s excellent video with the blue bubble at the 3 minute mark
Baseline does not exist.


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